Propeller



April 18, 1933. J. P.V RoDRlGul-:z l,904,752 v PROPELLER I Filed Aug. 13, 1930 v a? FI E- l. 1- 5 Patented Apr. 18, 1933 UNrluzDy IsTATEs 1 j 1,9o4,75.12 I

MET-Euror-FICE JUAN rEDBo nonmeunz, or LAKE woRTH, rLoRrDA, VAsselvon-or ormar-ALE ffro .'PROPELLER i Application filea August 13,"1930. serial N0.' 475,`111. i

The present invention relates to boat propellers, and aims to provide a noVel and improved propeller which will V`operate efliciently andmore smoothly than with the usual bladed propeller. i

Another object of the invention is the provision of a propeller which will also serve as a flywheel, and which is rugged in construc-v tion so as not to be apt to break in striking obstructions. I

The invention is illustrated in the accompanying drawing, whereini Figure 1 is a side elevation of a push pro-.

peller constructed in accordance with the present invention. i I

Fig. 2 is a rear end View thereof.

Fig. 3 is a cross section :on the line 37-3 of preferably rounded, as at 6, and said pro-V peller bodyV has diainetricallyV opposite straight diagonal channels 7 therein which lead from the front to the rear end of the body. Said channels are of substantially the same width and depth from end to end, so that they occupy considerably more of the circumference of the forward end portion of the body 5 than the circumference of the rear end thereof as seen in Fig. 2. The propeller body thus has curved surfaces of considerable extentf between the channels, and although two channels ar-e shown it is possible to use more, but it is preferable to have them spaced apart sufliciently to provide the curved surfaces on the circumference of `the propeller between the channels, to provide for smooth action of the propeller in the water. The propeller also has considerable weight in order to serve as a fly or balance wheel.

The channels 7 have the walls 8 Vand 9, the propeller being intended to rotate clock-wise as seen in Figs. 2 and 3. The walls 8 slope inwardly with respect to the direction of rotation, while the walls 8 catch the water during the rotation of the propeller and give the propeller its propelling force.

The propeller has a screwor'helix actioniin li i the water, andthetapered formof the {proi peller adds'to its iefiiciency,fi the :channels 17 being effective substantially .throughout the length thereof owing toythe fact .that j'the".

channels diverge from theaxis of rotation. Y

The, propeller afl'o'rfdsf increased power,

combined with smoother action and less churning of the water;

pro eller is attached toi'the propeller shaft 10,

wit the propeller at the Irear end of the shaft \I and servlng as a pushipropeller, whereas as shown in Fig. 4 the propeller is secured onthe forward end of the propellershaft 10'ftoj` serve as a pull propeller. The propeller shown in Fig. 1 is used at the stern of a boat,

while the propeller shownin Fig. tfis used at thebow.

The channels 7 are of a widthiand depth in i accordance with the power of the engine, 'andk i n being provided in the conical `body will produce less vibration and shock on the engine than with bladed propellers;

--The propeller may be used for landve-v .V

As shown in vFig; 1, the smaller end the j hicles, as well-as sleds, and may alsozbe used i for' airships. propeller is preferably constructed of light metal 'and is preferablyhollow orio'f shell form. A i i Having thus described the invention, what is claimed as new is: i.

1. A propeller comprising a frusto-conical body, said bodydished out to'form straight diagonal channels of uniform' width and,V`

depth extending from end to end of said body, relatively extensive portions between the vchannels for providing'smooth action of the propeller in thewater, and each of said chan- ,nels having an abrupt inwardlyjextending p wall and a wall extending substantially at a right angle to the first mentioned wall.V

2. A propeller comprising a frusto-conical body having a pair ofispacedrchannels, said V channels diverging from end to end and ,of`

substantially uniform width, and relatively extensive portions between the channels for providing smooth action-.of the propeller in the water; i y

, 3. A propeller comprising a tapered body,

When used inran airship the A 4ov signature.

said body provided with straight diagonal channels of uniform width and depth and having relatively extensive portions between the channels for providing smooth propeller action in the water, and each of said channelsl having an abrupt` inwardly extending wall and a wall extending at a-n angle to the first mentioned wall.

4. A propeller comprising a tapered body, said' body provided with straight diagonal channels of uniform width and depth and relatively extensive portions between the channels. V

5. A propeller comprising a tapered body provided with straight diagonal channels of uniform width. i

6. The structure of claim 5, characterized by each of said channels having an abrupt inwardly extendin'g wall.

In testimony whereof I hereunto affiX my J UAN PEDRO RODRIGUEZ. 

